10/24/2016
XML Service Manual
file:///C:/Users/sh.dehghani/Desktop/NNGS595AOTSVC_PHAMOS0511035C3/viewing/SGML_VIEW_DATA/OT/NNGS595A/SVC/PHAMOS0511035C3/inde…
2/6
H02
Memory IC error (It is able to show up both in test mode and cooking mode)
H00
RAM failure (It is able to show up both in test mode and cooking mode)
H20
Steam heater open error
Usage problem
U14
No water during steam cooking (It is able to show up both in test mode and cooking mode)
U40
No load operation
U65
Power down controlled by magnetron thermistor
HOT
Oven is hot (It is able to show up both in test mode and cooking mode)
7.1 (Trouble) Oven stops operation during cooking
SYMPTOM
CAUSE
CORRECTIONS
SYMPTOM
CAUSE
CORRECTIONS
1.
Oven stops in 3 seconds after
pressing start pad.
No input AC is supplied to H.V.Inverter (U) CN702
terminals
1. Latch Switch
2. Power relay RY1
3. Loose lead wire connector
CN701, CN702
Oven stops in 23 seconds after
pressing start pad.
H.V.Inverter (U) operates by the control signals from
DPC but magnetron is not oscillating
1. Magnetron
2. Loose lead wire connector
CN703
Oven stops in 1 minute after pressing
start pad. (Oven cooking)
Oven thermistor circuit is not functions.
1. Oven thermistor
2. Loose wiring
Oven stops in 30 seconds after
pressing start pad. (Steam cooking)
Steam heater thermistor circuit is not functions.
1. Steam heater thermistor
2. Loose wiring
3. bad conductibility between
thermistor and steam heater
2.
No display and no operation at all.
Fuse is blown.
Most probably loose connection of connectors, or door
latch mechanism is not adjusted properly
1. Align door, Door Latch
Switches
2. Loose wiring connectors
7.2 (Trouble) Other troubles
SYMPTOM
CAUSE
CORRECTIONS
SYMPTOM
CAUSE
CORRECTIONS
1.
Oven is dead.
Fuse is OK.
No display and no operation at
all.
1. Open or loose lead wire harness
Check fan motor if thermal cutout is
defective.
2. Open thermal cutout
3. Open low voltage transformer
4. Defective DPC
1. Shorted lead wire harness